There are 2 options you will know your results:
1. Wait for long time(Usually 3-4 weeks) without phone from Appletree, that means your test is passed. If you want to confirm with them, just pick up a phone;
2. You will got a call from Appletree, they will ask you to come in to see a doctor. It doesn't mean your results is bad, maybe the doctor just wants to explain something to you based on the results, to be more careful something... But if it is serious, then doctor will let you know right away, this time will be very quick.
Hope it helps!